Many of America’s iconic holiday candies have Philadelphia or Pennsylvania roots – like Peeps on Easter, Reese’s peanut butter cups on Halloween, and a good, old-fashioned Whitman’s Sampler box of chocolates on Valentine’s Day.

As a Philadelphian and a cultural historian who teaches students about the history of American corporations, the role of the city in the nation’s food history often comes up in my class.

Philadelphia was one of the largest port cities in the U.S. through the early 20th century. Sugar and other candy ingredients were readily available from Delaware River docks. Improvements to sugar refining made the product significantly cheaper during the first half of the 19th century, while the Second Industrial Revolution, in the late 1800s and early 1900s, expanded transportation and trade.

This led to a dramatic increase in candymakers and confectioners in Philadelphia. Many, like Whitman’s Chocolates, one of the oldest still in existence, were concentrated in the Old City neighborhood.

Old City was also home to the oldest candy distributor in the country. Casani Candy Company was founded in 1865. While the company now operates across the Delaware River in Pennsauken, New Jersey, it continues to distribute hundreds of products, including Asher’s candy, which was founded in Philadelphia in 1892.

The company that would become Wilbur’s Chocolate was founded in 1865 by Henry Oscar Wilbur and Samuel Croft. After several moves, and a split between........

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